This study aimed to analyse how different styles of online and offline communication were associated in middle adolescence with certain indicators of the quality of peer relationships and school victimisation. A longitudinal study with two waves separated by one year was conducted, in which 882 adolescents aged 13-16 years old from Andalusia (Spain) completed self-report measures. Results showed that online communication was very frequently used to talk with friends, even more often that offline means. Cross-sectionally, online communication was positively associated with quality of peer relationships and negatively to school victimisation, reaching stronger associations than offline communication. Longitudinally, results indicated that more frequent text messaging was related to more easiness to make friends and no bullying in those adolescents with more initial difficulties. Thus, it suggests the need to develop safe spaces for online interactions in order to improve the quality of their relationships with their friends and partners.